• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Investigating Osmosis In Potato Cells

Extracts from this document...

Introduction

Investigating Osmosis In Potato Cells Introduction Osmosis is a form of diffusion but specifically for water, it is the diffusion of water from a dilute solution to a more concentrated solution through a semi permeable membrane. In this experiment we used water because in osmosis only water molecules can be used Prediction Tubes Predictions Explanation 1 and 2 The mass and length will go up The concentration is less in the chip 3 and 4 The mass and length will stay the same The concentration is the same as in the chip 5 and 6 The mass and length will go down The concentration is more in the chip Method Apparatus * Cork borer * Scalpel * 6 boiling tubes * 6 potato chips * Distilled water * 2.8 M sucrose * Electronic scales * Ruler * Pen Firstly we cut 6 potato chips with a cork borer, and then we squared off the edges with a scalpel, so they were all the same size, so that it could be made a fair test. ...read more.

Middle

Mass (g) Length (mm) Mass (g) Length (mm) Mass (g) Length (mm) 1 0.4 3.6 46 4.2 49 +16.7 +6.5 2 0.4 3.5 45 4.0 48 +14.3 +6.7 3 0.0 4.1 55 3.6 53 -12.2 -3.6 4 0.0 4.0 52 3.5 51 -14.3 -1.9 5 1.0 2.7 46 1.8 38 -33.3 -17.4 6 1.0 2.9 52 2.4 45 -17.2 -13.5 To make the results as accurate as possible we made sure that we patted the chips dry before we measured the mass and length of them, we also measure to the most accurate number possible with the apparatus we had. We also took accurate averages to help us understand how the mass and length of the chips had changed. Conclusion The results show that in Tubes 1 and 2 the mass and the length went up Tubes 3 and 4 the mass and the length of the chips went down slightly Tubes 5 and 6 the mass and the length went down a lot The pattern on my graph shows that the mass changed a lot more than the length in this experiment. ...read more.

Conclusion

Probably the hardest part of the experiment was measuring the final lengths of the chip left in the 1.0M of sucrose, because it was very soft and flaccid, and it was hard to measure the length because it could stretch of squash up. To overcome this problem I squashed the flaccid chips into rectangular shapes, this was the most accurate way of measuring the chips' length. The results of Tubes 3 and 4 surprised me, as I thought the chips mass and length would stay the same, as it didn't change in shape in any way, I'm sure there is a scientific explanation of why this happened, but I personally do not know why, with my scientific knowledge. This problem lessened the accuracy of my results, but in comparison with other experiments, the results seem as reliable and accurate as possible under the conditions. I think the accuracy and reliability of the results could be improved, they might be more accurate, if 3 experiments were made and an average was taken to make sure all the readings were accurate. Also it could have been improved if we had chips that were all the same length, then more accurate comparisons could have been made. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Exchange, Transport & Reproduction section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Exchange, Transport & Reproduction essays

  1. Peer reviewed

    The comparison of antibacterial properties of herbal products and standard antibiotics

    5 star(s)

    Research into gram staining has shown that E.coli is that of a gram negative variation and M.luteus is gram positive, therefore providing reason for the results to vary on the different bacteria's, although they didn't vary hugely. The final results table shows that penicillin near enough failed to inhibit the

  2. Osmosis in Potato cells

    * A white tile was used on which to cut the potato chips. * The solutions were measured out for us and left in plastic containers clearly labelled distilled water 10% sucrose, 15% sucrose etc. * Paper towels were used to dry the potato chips once removed from the solutions.

  1. Investigation on Osmosis using a potato.

    This strong negative correlation is where the points are very close to the line of best fit and the negative part is the where the line of best fit goes down towards the x axis. At the point where there is no sucrose solution and just thirty millilitres of distilled

  2. We will be investigating osmosis and its effect on potato chips.

    I also have to consider the measuring cylinder and how I will measure the solution. To be as accurate I will be using a pipette which will enable to put more solution in slowly and take out solution to the desired amount.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work